| 摘要 |
PROBLEM TO BE SOLVED: To provide: a compact, high-performance, and highly pressure-resistant heat exchanger which is capable of efficiently exchanging heat between a heat medium and a high-temperature and high-pressure refrigerant; and a low power consumption vehicle air conditioning device which can perform heating with the heat medium, which is heated by the heat exchanger, as a heat source for heating.SOLUTION: In a heat exchanger 1 for exchanging heat mutually between a refrigerant and a heat medium, multiple refrigerant flat tubes 2, through which the refrigerant circulates, and multiple heat medium flat tubes 3, through which a heat medium circulates, are layered alternately in multiple layers and bonded together, and a pair of refrigerant-side header tanks 6, 7 and heat medium-side header tanks 8, 9, which distribute and collect the refrigerant and the heat medium respectively, are provided at both ends of the multiple refrigerant flat tubes 2 and the multiple heat medium flat tubes 3. |
